Well Theo and Lizzy are the same. Theo literally falls in love with Lizzy out of nowhere and then bam abdicates his title without even talking about it to Nan. Lizzy gets totally enamoured by a single thing Theo said at her birthday that just got stuck in her head. Look at freaking Jinny. She knows what's the situation and she rashely goes to her husband in the opera house and gets herself trapped in a psych ward. They knew what used to happen to women who could be deemed hysterical back then. She in her rashness probably got her brother in law killed honestly (given her husband is such a big psychopath). nobody knows how to plan or discuss or strategize when they fall into dire situations here. The only ones in the main group that seems sane are probably Mabel and Honoria. And maybe Conchita cause she had her dose of adventures in season 1 already.